by d100pete

Sites that you can find pictures that you have permission to use:

Remember to select:
Creative Commons: Only + Seek Original: On + Safe Search: On

Here are 2 cool flickr search tools that give you the thumbnail and all the attribution information
http://flickrcc.bluemountains.net/index.php
http://johnjohnston.name/flickrCC/
Flickr Storm http://www.zoo-m.com/flickr-storm/
allows you to create a tray of images students can use without having them search on their own